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Science 9 June 1967:
Vol. 156. no. 3780, pp. 1361 - 1362
DOI: 10.1126/science.156.3780.1361
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Articles

Fresnoite: Unusal Titanium Coordination

Paul B. Moore 1 and John Louisnathan 1

1 Department of the Geophysical Sciences, University of Chicago, Chicago, Illinois

The crystal structure of fresnoite, Ba2(TiO)[Si2O7], consists of [Si2O7]6- double groups and titanium-centered square pyramids linked to form flat sheets. Intercalated between these sheets are Ba2+ ions in highly distorted pentagonal antiprisms. The structure of fresnoite is related to that of melilite, (Ca,Na)2(Mg,Al[Si27].


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Porous titanosilicate nanorods in the structure of yuksporite, (Sr,Ba)2K4(Ca,Na)14({square},Mn,Fe) {(Ti,Nb)4(O,OH)4[Si6O17]2[Si2O7]3}(H2O,OH)n, resolved using synchrotron radiation.
S. V. Krivovichev, S. V. Krivovichev, V. N. Yakovenchuk, T. Armbruster, N. Dobelin, P. Pattison, H.-P. Weber, and W. Depmeier (2004)
American Mineralogist 89, 1561-1565
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